>> I don't need the system to be Media Centre Edition capable; for most things (except the tv tuner remote) i'll use a wireless keyboard and mouse to access things.

>> The TV is a decent 27" Standard Definition TV, the output will be S-video to Component output (RGB cables). I only need the HDCP compliancy if a) I want to play HD movies on my machine and/or b) I finally do get an HD TV. The resolution will be low, but i can deal with it.

>> The hard drive doesn't need to be very big; actual media content will be stored on a seperate computer, a File Server i'm building; connected via Ethernet through a (small) home network with decent transfer rates. Though if necessary I will store files in use on the HDD temporarily.

>> Noise isn't too big of a problem, as long as the thing doesn't fall outside of reasonable ambience level (no louder than an Xbox 360 minus game in tray).

One question remains: What is the absolute minimum wattage this PSU till take? I shall try and find a good MATX PSU for this system.

information, commentary, etc much appreciated! If I think of anything else i'll edit it in.

1) Would this rig get away with the 350W PSU that comes with the case?

In short, yes it would. But the power supply will be running close to maximum for most of it's life, and may fail on you because of that. I would suggest buying a better one.

Quote:

Originally Posted by Mr. Gruntsworthy

2) I know it's aging, but the Radeon X1650 pro i have lying around seems like it would go well with this HTPC (after I clean it out and fix it up). Is the X1650 pro HD compliant? (ie, can I play blu-ray movies with no problem?)

No, the X1xxx series is not fully HD compliant in that it does not support onboard decoding of HD content. You'll need an X2xxx series or HD3xxx series (or newer) to get that. The 3600-series card you were looking at would do that well.

Quote:

Originally Posted by Mr. Gruntsworthy

3) Will the TV tuner work with the system okay? the system itself is not Media Centre edition, but that doesn't matter to me. I just need to make sure it'll work with the system.

I've been looking at your proposed build & have a few comments, having an HTPC myself.

1) Instead of the HD3650 listed I would seriously consider the newer HD4550 unless of course you already have the 3650 in hand. These newer cards now support 8 Channel LPCM over HDMI which the 3xxx series did not.

2) Much has been said about how much power supply is needed without looking at the Quality of the unit first . Given the specs of your proposed system a quality 300W PS would do great. Anandtech has an excellent article, and a Must Read Imho, on how much power supply do you really need. AnandTech: Debunking Power Supply Myths
Lots of "Myths" are debunked in this article and it mirrors my own experiences with my systems including my HTPC.

I do not believe that a quality 300W supply will run anywhere close to its max specs given your proposed component list, in particular given the systems' intended use & since you are not overclocking.

I have been very generous overestimating the Misc power requirements (Includes Hard Drive, optical drives, ect.) which would probably never reach even close to 50W at any load. In everyday use you systems load averages will be much lower than the full load figures I've listed above.

An interesting observation is that most 300-400w PS's don't even reach thier max efficiency untill the 125-200W range.

System current draw during post especially can go far above the Full Load power requirements for certain components. Therefore, If the system at full load uses 150W then during post a spike might reach as high as 250W or more. This is why I suggested getting a slightly higher power supply, one with Active PFC would help as well.

Yeah, you get a startup spike at power-up, but since you'll never see the other components (CPU/Video) maxed out during this time, it's not a serious issue. And even if the spike approaches the PSU's max, it's only temporary, and not going to impact the life expectancy of a good PSU ('good' being the operative word, of course).

And there's no way this system is going to pull much power. Seriously, I can't pull over 400W from the wall with my overclocked Q6600/8800GTS 640 combo. For this HTPC, I'm inclined to agree with Kingnubian's power assessment. Something in the 200-250W range will help keep the PSU working in the better parts of its efficiency curve.